There is a concept in US copyright known as "thin" copyright. Collections of uncopyrightable information can in fact be copyrighted, but the arrangement of the information must have some spark or minimal creative energy. Mere "sweat of the brow" is insufficient to confer copyrightability on the work.
Such "thin" copyright tends to mean that there is a strong presumption against infringement. You generally need to demonstrate that the work has been copied virtually in its entirety to find infringement; partial borrowing is insufficient.
Such "thin" copyright tends to mean that there is a strong presumption against infringement. You generally need to demonstrate that the work has been copied virtually in its entirety to find infringement; partial borrowing is insufficient.